I am making my way through all of Liane Moriarity's books since reading Big Little Lies, which I loved! This is an earlier book by the author with the same signature style: humorous, thought-provoking, mysterious, frightening.
The story is set in Australia on Scribbly Gum island. It switches between 1932 when the "Munro Baby Mystery" occurred and present day when Sophie is shocked to discover that she will inherit her ex-boyfriend's aunt's house - the same house that was involved in the mystery.
This is a real page-turner that is hard to put down. Try it if you have enjoyed other books by Liane Moriarity or The Girl on the Train by Paula Hawkins.